Two Locations

Greeneville & Johnson City

Call Us

(423) 588-5660

Meet Our Providers

Get to know our team at Trinity Heart and Vascular Group.

Daniel O'Roark, DO, FACC

Dr. O’Roark is a 1984 graduate of Philadelphia College of Osteopathic Medicine. He completed an internal medicine residency in 1987 at Grandview Hospital and Medical Center in Dayton, OH, and completed a cardiology Fellowship in 1989 at St. Francis Medical Center in Pittsburgh, PA.

Dr. O’Roark holds board certifications in internal medicine, cardiovascular diseases, echocardiography (cardiac ultrasound), and nuclear cardiology.

He has clinically directed and overseen the accreditation of two busy nuclear cardiology labs in his 30+ years of cardiology practice experience.

Dr. O’Roark is a Fellow of the American College of Cardiology, and is licensed to practice medicine in Tennessee and Virginia.

Dr. O’Roark serves both of our office locations in Greeneville, TN and Johnson City, TN.

Nolan Hensley, PA-C

Nolan Hensley is a Certified Physician Assistant, as recognized by the National Commission on Certification of Physician Assistants.

Mr. Hensley obtained a Bachelors degree in Cardiopulmonary Science from East Tennessee State University in 2015, and went on to receive his PA degree from Lincoln Memorial University DeBusk College of Osteopathic Medicine in 2019, where he was the recipient of the LeCont Rural Medicine Scholarship. 

He served the Greeneville community as a Respiratory Therapist at Laughlin Memorial Hospital throughout his Physician Assistant training, and has been serving East Tennessee in cardiovascular medicine since 2019.

He is experienced in the management of complex acute and chronic cardiovascular conditions in patients over a broad range of ages, and also has extensive experience supervising cardiac stress tests.

Mr. Hensley is licensed to practice medicine in the state of Tennessee, and currently serves our Greeneville office. In addition to providing cardiac care, he also offers primary care services for adults and children (ages 6 and up).

How We Work

Delivering Excellent Cardiac Care

Our mission to is to provide comprehensive and exceptional services for your heart-related health needs. What’s more is that we strive to provide those services at prices that reflect a fair-market value. Find out if our practice is a good fit for you by reading about our unique approach to cardiovascular care.